The early phases in safety engineering (the Item Definition and the Hazard Analysis and Risk Assessment (H+R)) set the foundation for the overall development of safety-relevant systems. Furthermore, Hazards and their related risks affect all manufacturers in the same way. Hence, a common understanding and appraisal of Hazards should be established in a systematic way. Numerous methods and techniques for formalizations und structuring of processes and artifacts in safety critical development exist, but most of those deal with challenges arising once a hazard is defined and one is interested in its origin, or its mitigation strategy. The research and practical approaches to support the prerequisite for all the other techniques, the hazard analysis and risk assessment, is still weak. We therefore present in this paper SAHARA, a systematic approach for hazard analysis and risk assessment. The condensed information necessary from ISO DIS 26262 point of view is (1) the situation analysis, (2) hazard identification and analysis, and (3) a classification of the contributing factors exposure, severity, and controllability, which results in an ASIL assignment for each hazard. Leveraging model-based techniques, SAHARA captures relevant information in a more formal and semantically enriched way. This enables comparability, consistency, and reusability of H+Rs of different persons, different groups or even different companies, which increases the confidence, quality, and efficiency of H+Rs.

@TECHREPORT{Kemmann2011,
author = {Kemmann, Sören and Trapp, Mario},
title = {SAHARA - A Systematic Approach for Hazard and Risk Assessment},
institution = {SAE},
year = {2011},
number = {2011-01-1003},
abstract = {The early phases in safety engineering (the Item Definition and the
Hazard Analysis and Risk Assessment (H+R)) set the foundation for
the overall development of safety-relevant systems. Furthermore,
Hazards and their related risks affect all manufacturers in the same
way. Hence, a common understanding and appraisal of Hazards should
be established in a systematic way. Numerous methods and techniques
for formalizations und structuring of processes and artifacts in
safety critical development exist, but most of those deal with challenges
arising once a hazard is defined and one is interested in its origin,
or its mitigation strategy. The research and practical approaches
to support the prerequisite for all the other techniques, the hazard
analysis and risk assessment, is still weak. We therefore present
in this paper SAHARA, a systematic approach for hazard analysis and
risk assessment. The condensed information necessary from ISO DIS
26262 point of view is (1) the situation analysis, (2) hazard identification
and analysis, and (3) a classification of the contributing factors
exposure, severity, and controllability, which results in an ASIL
assignment for each hazard. Leveraging model-based techniques, SAHARA
captures relevant information in a more formal and semantically enriched
way. This enables comparability, consistency, and reusability of
H+Rs of different persons, different groups or even different companies,
which increases the confidence, quality, and efficiency of H+Rs.},
doi = {10.4271/2011-01-1003}
}